EbookLib is a Python library for managing EPUB2/EPUB3 and Kindle files. It's capable of reading and writing EPUB files programmatically (Kindle support is under development).

rtl-sdr is a software defined radio (SDR) receiver software for certain low-cost DVB-T/DAB(+) USB dongles based on the Realtek RTL2832U chip.

chess engine compatible with xboard, but may also be used stand-alone, via terminal. Hoichess is written in C++ for GNU/Linux systems, but should work on most other Unix like systems. It provides also a xiangqi ("Chinese chess") playing program.

The Uralic fonts contain additional letters used in most Uralic languages with Russian-based writing systems - Khanty (all dialects), Komi, Mansi (without marking long vowels), Mari, Nenets, Selkup and Udmurt. The fonts also support Altai, Chukchi, Even, Evenki, Koryak and Nanai.

This package contains optional components of the GNU troff text-formatting system. The core package, groff-base, contains the traditional tools like troff, nroff, tbl, eqn, and pic. This package contains additional devices and drivers for output to DVI, HTML (when recommended packages are installed - see below), PDF, HP LaserJet printers, and Canon CAPSL LBP-4 and LBP-8 printers.